At temperature T, a compound `AB_(2)(g)` dissociates according to the reaction
`2AB_(2)(g)hArr2AB(g)+B_(2)(g)`
with degree of dissociation `alpha`, which is small compared with unity. The expression for `K_(p)` in terms of `alpha` and the total pressure `P_(T)` is

Options

A. `(Px^(3))/(2)`
B. `(Px^(2))/(2)`
C. `(Px^(3))/(3)`
D. `(x^(4))/(2)`

Answer

A